[ARM] Unuse another Linux PTE bit
L_PTE_ASID is not really required to be stored in every PTE, since we
can identify it via the address passed to set_pte_at(). So, create
set_pte_ext() which takes the address of the PTE to set, the Linux
PTE value, and the additional CPU PTE bits which aren't encoded in
the Linux PTE value.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/include/asm-arm/cpu-multi32.h b/include/asm-arm/cpu-multi32.h
index 4679f63..715e18a 100644
--- a/include/asm-arm/cpu-multi32.h
+++ b/include/asm-arm/cpu-multi32.h
@@ -50,9 +50,10 @@
*/
void (*switch_mm)(unsigned long pgd_phys, struct mm_struct *mm);
/*
- * Set a PTE
+ * Set a possibly extended PTE. Non-extended PTEs should
+ * ignore 'ext'.
*/
- void (*set_pte)(pte_t *ptep, pte_t pte);
+ void (*set_pte_ext)(pte_t *ptep, pte_t pte, unsigned int ext);
} processor;
#define cpu_proc_init() processor._proc_init()
@@ -60,5 +61,5 @@
#define cpu_reset(addr) processor.reset(addr)
#define cpu_do_idle() processor._do_idle()
#define cpu_dcache_clean_area(addr,sz) processor.dcache_clean_area(addr,sz)
-#define cpu_set_pte(ptep, pte) processor.set_pte(ptep, pte)
+#define cpu_set_pte_ext(ptep,pte,ext) processor.set_pte_ext(ptep,pte,ext)
#define cpu_do_switch_mm(pgd,mm) processor.switch_mm(pgd,mm)
diff --git a/include/asm-arm/cpu-single.h b/include/asm-arm/cpu-single.h
index 6723e67..0b120ee 100644
--- a/include/asm-arm/cpu-single.h
+++ b/include/asm-arm/cpu-single.h
@@ -28,7 +28,7 @@
#define cpu_do_idle __cpu_fn(CPU_NAME,_do_idle)
#define cpu_dcache_clean_area __cpu_fn(CPU_NAME,_dcache_clean_area)
#define cpu_do_switch_mm __cpu_fn(CPU_NAME,_switch_mm)
-#define cpu_set_pte __cpu_fn(CPU_NAME,_set_pte)
+#define cpu_set_pte_ext __cpu_fn(CPU_NAME,_set_pte_ext)
#include <asm/page.h>
@@ -40,5 +40,5 @@
extern int cpu_do_idle(void);
extern void cpu_dcache_clean_area(void *, int);
extern void cpu_do_switch_mm(unsigned long pgd_phys, struct mm_struct *mm);
-extern void cpu_set_pte(pte_t *ptep, pte_t pte);
+extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
extern void cpu_reset(unsigned long addr) __attribute__((noreturn));
diff --git a/include/asm-arm/pgtable.h b/include/asm-arm/pgtable.h
index 88cd5c7..b8cf2d5 100644
--- a/include/asm-arm/pgtable.h
+++ b/include/asm-arm/pgtable.h
@@ -21,6 +21,7 @@
#include <asm/memory.h>
#include <asm/arch/vmalloc.h>
+#include <asm/pgtable-hwdef.h>
/*
* Just any arbitrary offset to the start of the vmalloc VM area: the
@@ -170,7 +171,6 @@
#define L_PTE_EXEC (1 << 6)
#define L_PTE_DIRTY (1 << 7)
#define L_PTE_SHARED (1 << 10) /* shared(v6), coherent(xsc3) */
-#define L_PTE_ASID (1 << 11) /* non-global (use ASID, v6) */
#ifndef __ASSEMBLY__
@@ -228,7 +228,7 @@
#define pfn_pte(pfn,prot) (__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
#define pte_none(pte) (!pte_val(pte))
-#define pte_clear(mm,addr,ptep) set_pte_at((mm),(addr),(ptep), __pte(0))
+#define pte_clear(mm,addr,ptep) set_pte_ext(ptep, __pte(0), 0)
#define pte_page(pte) (pfn_to_page(pte_pfn(pte)))
#define pte_offset_kernel(dir,addr) (pmd_page_vaddr(*(dir)) + __pte_index(addr))
#define pte_offset_map(dir,addr) (pmd_page_vaddr(*(dir)) + __pte_index(addr))
@@ -236,8 +236,11 @@
#define pte_unmap(pte) do { } while (0)
#define pte_unmap_nested(pte) do { } while (0)
-#define set_pte(ptep, pte) cpu_set_pte(ptep,pte)
-#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
+#define set_pte_ext(ptep,pte,ext) cpu_set_pte_ext(ptep,pte,ext)
+
+#define set_pte_at(mm,addr,ptep,pteval) do { \
+ set_pte_ext(ptep, pteval, (addr) >= PAGE_OFFSET ? 0 : PTE_EXT_NG); \
+ } while (0)
/*
* The following only work if pte_present() is true.